The 'much much better engine' statement- my answer is still the same - it depends on what you're going to do with it. Since you only want to discuss stock short block motors, I'll keep it to that.
Stock short block:
NA? Advantage hemi (5.7 vs 5.3/4.8 - tough to make up for the displacement and head difference)
Boost? Hemi for under 8 psi, LSx past 8 psi
Nitrous? Hemi for under 150 shot, LSx past that.
Do you disagree with the last 3 lines?